Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS4192076 A
Publication typeGrant
Application numberUS 05/953,704
Publication dateMar 11, 1980
Filing dateOct 23, 1978
Priority dateOct 23, 1978
Publication number05953704, 953704, US 4192076 A, US 4192076A, US-A-4192076, US4192076 A, US4192076A
InventorsGeorge W. Hall
Original AssigneeHall George W
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Device for holding a surveyor's instrument
US 4192076 A
Abstract
The device of the present invention comprises a tripod having a platform at its top and three legs pivotally connected at their upper ends to the platform member and diverging downwardly and outwardly therefrom. Three connecting members interconnect the lower ends of the tripod legs. A stake holding means is provided on the tripod and includes an upper bracket connected to the tripod platform and a lower bracket connected to one of the connecting members. The upper and lower brackets each have an opening therein, and the openings of the two brackets are vertically registered for receiving a surveyor's stake.
Images(1)
Previous page
Next page
Claims(10)
What is claimed is:
1. A device for holding a surveyor's stake comprising:
a tripod having a platform member and three legs hingedly connected at their upper ends to said platform member;
three connecting members interconnecting said lower ends of said legs, each of said connecting members having one of its ends detachably secured adjacent the lower end of one of said legs and the other of its ends detachably secured adjacent the lower end of another of said legs, whereby said connecting members when so secured to said legs hold said legs against pivotal movement of said legs about their hinged connections to said platform member; and
stake holding means on said tripod for holding said stake against movement with respect to said tripod,
said stake holding means comprising an upper bracket and a lower bracket, said upper bracket being operatively mounted to said platform and said lower bracket being operatively connected to one of said connecting members.
2. A device according to claim 1 wherein said stake holding means comprises and upper bracket and a lower bracket, said upper bracket being operatively mounted to said platform and said lower bracket being operatively connected to one of said connecting members.
3. A device according to claim 1 wherein said upper bracket includes an opening therein sized to slidably embrace said surveyor's stake, said lower bracket also having an opening therein similarly sized, said holes upper and lower bracket being vertically aligned.
4. A device according to claim 3 wherein said holes of said upper and lower brackets are positioned radially outwardly from the vertical centerline of said tripod and radially inwardly from said connecting members.
5. A device according to claim 4 wherein said upper bracket is adjustably mounted by upper bracket mounting means to said platform for selective adjustable movement radially and circumferentially with respect to the vertical centerline of said tripod.
6. A device according to claim 5 wherein said stake is slidably inserted into said vertically aligned holes, said stake comprising a plurality of stake sections, one of said stake sections being an upper tube having a second tube telescopically received therein, locking means being provided on said upper tube for selectively locking said upper tube and said second tube at various telescopic positions with respect to one another.
7. A device according to claim 6 wherein said second tube has a pin fixedly mounted within the lower end thereof, said pin having one end protruding downwardly from said lower end of said second tube, a third tube having a tubular upper end telescopically receiving said pin from said second tube, said second and third tubes being of approximately the same size.
8. A device according to claim 5 wherein said upper bracket comprises an elongated member having an elongated slot extending along at least a portion thereof, said upper bracket mounting means comprising a threaded bolt connected to said platform and extending upwardly through said slot, a wing nut being threaded over the upper end of said bolt for selectively holding said upper bracket against movement.
9. A device according to claim 8 wherein said lower bracket comprises a J-shaped member having a hook shaped end sized to hook around said connecting member, bolt means extending through said hook shaped end and said connecting member to rigidly attach said bracket to said connecting member.
10. A device according to claim 9 wherein said lower bracket is attached to said connecting member adjacent the longitudinal midpoint thereof.
Description
BACKGROUND OF THE INVENTION

This invention relates to surveying equipment, and specifically to a device for holding a surveyor's stake or instrument.

Present surveyor's equipment includes electronic sighting devices which are aimed at a target instrument positioned some distance away. The target instrument is usually placed on the upper end of a surveyor's stake and is capable of receiving a signal from the sighting instrument and directing a signal back to the sighting instrument.

When using the above types of surveying equipment it becomes very important that the surveyor's pole or stake be accurately positioned, and that it be held in a stationary position during the takings of the various sightings.

Various holding devices have been used for holding the surveyor's stake or pole, but many of these devices are unstable and fall over easily. They often fall over in response to wind or in response to being bumped or jostled.

Surveying equipment is often used on busy highways where much traffic is encountered, and often the instruments are bumped or jostled or run over by vehicles. Therefore, it is desirable that these holding devices be constructed of materials which can easily be repaired or replaced with a minimum of expense.

SUMMARY OF THE INVENTION

The present invention utilizes a tripod which includes a plurality of connecting members which are detachably secured and which interconnect the lower ends of the tripod legs. The resulting configuration is a tetrahedran. The connecting members greatly enhance the stability of the device.

Brackets are also provided on the tripod for holding a surveyor's stake or pole in a vertical position. The brackets include an upper bracket connected to the platform and a lower bracket connected to one of the connecting members. The two brackets each include an opening therein which is sized to receive the surveyor's stake. The two openings of the two brackets are vertically registered so as to receive the stake.

Therefore, a primary object of the present invention is the provision of an improved device for holding a surveyor's instrument.

A further object of the present invention is the provision of a device for holding a surveyor's instrument which hs improved stability over prior art devices.

A further object of the present invention is the provision of a device for holding a surveyor's instrument which holds the tripod legs in a stationary position and prevents them from moving with respect to one another.

A further object of the present invention is the provision of a device for holding a surveyor's instrument which keeps the center of gravity of the combined tripod and surveyor's stake radially inwardly from the leg ends of the tripod.

A further object of the present invention is the provision of a device for holding a surveyor's instrument which includes brackets for gripping the surveyor's stake at two spaced apart vertical points.

A further object of the present invention is the provision of a device for holding a surveyor's instrument which is easily adjustable so as to permit the plumbing of the surveyor's stake.

A further object of the present invention is the provision of a device for holding a surveyor's instrument which is light and easy to transport.

A further object of the present invention is the provision of a device for holding a surveyor's instrument which is easy to disassemble and repair.

A further object of the present invention is the provision of a surveyor's instrument which includes a surveyor's pole which can be easily and quickly expanded to varying lengths.

A further object of the present invention is the provision of a device for holding a surveyor's instrument which is economical to manufacure, durable in use, and efficient in operation.

BRIEF DESCRIPTION OF FIGURES OF DRAWINGS

FIG. 1 is a perspective view of the present invention.

FIG. 2 is a top plan view taken along line 2--2 of FIG. 1.

FIG. 3 is a sectional view taken along line 3--3 of FIG. 2.

FIG. 4 is a perspective view of the upper bracket used in the present invention.

FIG. 5 is a perspective view of the lower bracket used in the present invention.

FIG. 6 is an exploded perspective view of the expandable pole used with the present invention.

FIG. 7 is an enlarged detail view of the junction between two connecting members and one of the tripod legs.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to the drawings, the numeral 10 generally designates the holding device of the present invention. Device 10 includes a tripod 12 and a surveyor's pole or stake 14.

Tripod 12 comprises a platform 16, having three legs 18, 20 and 22 extending downwardly and diverging outwardly therefrom. Each leg is hinged to platform 16 by means of a U-shaped bracket 24 (FIG. 3) having a hinge bolt 26 pivotally connecting the upper end of one of the legs 18, 20, 22 to U-shaped bracket 24. Brackets 24 are operatively secured to the undersurface of platform 16 by means of screws 28. The pivotal connection of legs 18, 20 and 22 to brackets 24 permits the legs to swing radially outwardly from platform 16, and permits the legs to be swung radially inwardly for folding for carrying.

Interconnecting the lower ends of legs 18, 20, 22 are three connecting members 30, 32, 34. Each connecting member is of tube-like construction and includes opposite flattened ends 36 which include apertures therein for receiving a bolt 38 which extends through each of the lower ends of legs 18, 20 and 22. A wing nut 40 is threaded over bolt 38 at each of the lower ends of legs 18, 20 and 22, so as to secure the opposite ends of connecting members 30, 32 and 34 therebetween. The connecting members can easily be removed by loosening wing nut 40 and slipping the flattened ends 36 off of the bolt 38.

An upper mounting bracket 42 (FIG. 4) is constructed of plate like material and includes at one end a circular opening 44 having a lobe 46 adjacent one side thereof. At the other end of bracket 42 is an elongated slot 48 which extends along the longitudinal centerline of bracket 42.

Bracket 42 is mounted to platform 16 by means of a wing nut 50 and a bolt 52 which extends through slot 48. The position of bracket 42 with respect to platform 16 may be adjusted radially by loosening wing nut 50 and sliding bracket 42 radially away from the vertical centerline of the tripod. Slot 48 permits this radial movement, and also permits pivotal movement about bolt 52 for circumferential adjustment of opening 44.

A lower mounting bracket 54 is shown in FIG. 5 and includes a hook portion 56 at one end and a circular opening 58 at the other end. Hook portion 56 is sized to fit over one of the connecting members 30, 32, 34 in the manner shown in FIGS. 1 and 2. A pair of bolt holes 60 are provided in J-shaped hook portion 56 and are adapted to register in corresponding holes located at the approximate midpoint of connecting members 30, 32 and 34 for receiving bolts 62, and thereby securing bracket 54 to the connecting member.

Upper bracket 42 is adjusted to be in a position wherein circular opening 44 is in registered alignment above circular opening 58 of lower bracket 54. Slidably inserted through registered openings 44, 58 is the surveyor's pole or stake 14 which is shown in greater detail in FIG. 6. Pole 14 is comprised generally of three tubular sections 64, 66 and 68. Tube section 64 includes an elongated slot 70 extending along the length thereof. Telescopically received within the upper end of tube section 64 is a stub shaft 72 having a threaded end 74 for receiving a surveyor's instrument 76 (FIG. 1) thereon. A ring clamp 78 embraces the upper end of tube section 64 and is tightened to cause tube section 64 to clamp tightly around the lower end of stub shaft 72, thereby connecting stub shaft 72 to tube section 64.

Tube section 66 is telescopically received within tube section 64, and includes a bolt receiving hole 78 which is aligned with slot 74 of tube section 64. A bolt 80 extends through a clamp 82 and thence through slot 70 into threaded engagement with bolt hole 78. By tightening bolt 80 it is possible to prevent telescopic expansion and retraction of members 64, 66 with respect to one another. Loosening of bolt 80 permits telescopic expansion or retraction of these two members to the desired length.

The lower end of tube section 66 includes a pin 84 which is riveted or otherwise secured therein. Pin 84 includes a sharpened lower point 86 which can be forced into the ground if desired. If a longer extension of tube 14 is required, tube section 68 can be slidably fitted over pin 84. A slot 88 in tube section 68 is registered with a bolt in pin 84 and tightening of bolt 90 secures two tube sections 66, 68 together. A pin 92 similar to pin 84 is mounted within the lower end of tube section 68. Lobe 46 of opening 44 accommodates the head of screw 90 so as to permit stake 14 to slide freely through opening 44 of bracket 42.

The device of the present invention is very sturdy inasmuch as pole 14 is held radially inwardly from the outer radial edges of legs 20, 22 and 24. Similarly, the adjustment of pole 14 may be easily accomplished by loosening wing nut 50 and moving upper bracket 42 until pole 14 is in a vertical plumb position. Then wing nut 50 need only be tightened to secure the pole in a fixed position.

The connecting members 30, 32, 34 provide additional stability to the device and the tendency of the device to tip or move in response to wind is minimal. The pole 14 is grasped at two spaced apart points by upper bracket 42 and lower bracket 54, and this provides increased stability for pole 14 during the surveying operation.

The device may be easily folded merely by loosening the wing nuts at the ends of the three legs, removing the connecting members, and folding the legs into a folded position. The legs and connecting members are constructed of tube like conduits and may easily be replaced in the event of bending or damage. The pole may be telescoped to various lengths depending upon the length needed for the particular surveying operation. Thus, it can be seen that the device accomplishes at least all of its stated objectives.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US765871 *Nov 27, 1903Jul 26, 1904Henry King AkinsLeveling instrument.
US1030938 *Dec 27, 1910Jul 2, 1912Henry StampsLevel-stand.
US1976264 *Nov 13, 1929Oct 9, 1934Charles D HyattSectional range pole
US2802635 *Dec 6, 1954Aug 13, 1957Northrop Aircraft IncFlex jack
US3239176 *Sep 2, 1964Mar 8, 1966Johnson Edward ESurveyor's level rod and range pole holder
US3704367 *Nov 12, 1971Nov 28, 1972Lawrence J KorbLighted christmas star display
US3857639 *Dec 21, 1973Dec 31, 1974New Hampshire Ball BearingsElectronic target
AT170911B * Title not available
FR1250579A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4290207 *Mar 6, 1980Sep 22, 1981Browning James SSurveying instrument
US4339880 *Nov 26, 1979Jul 20, 1982Beverly J. HallDevice for holding surveyor's instrument
US4492354 *Jan 20, 1983Jan 8, 1985R. B. Industries, Inc.Collapsible stand for roller support
US4521036 *Jan 26, 1982Jun 4, 1985Howell Jr William TSprinkler head support
US4879815 *Oct 13, 1988Nov 14, 1989Adolph Coors CompanyAlignment apparatus
US5320316 *Sep 2, 1992Jun 14, 1994Ronford-Baker Engineering Co., Ltd.Portable stands or supports
US6834839 *Oct 22, 2002Dec 28, 2004Eldridge W. WilsonPrism pole stand with clamping device and assembly
US6874239 *Jan 6, 2004Apr 5, 2005Troy WhiteSelf-holding and self-leveling device for survey range pole and method of use
US7048241 *Apr 18, 2003May 23, 2006Crain Enterprises, Inc.Geomatic support having hinged legs with hinge lock
US7124985Apr 18, 2003Oct 24, 2006Crain Enterprises, Inc.Geomatic pole support with telescoping legs and locks
US7207534Apr 18, 2003Apr 24, 2007Crain Enterprises, Inc.Geomatic pole support and foot therefor
US7222827Apr 18, 2003May 29, 2007Crain Enterprises, Inc.Telescoping leg lock with thumb actuator
US7240881Jan 17, 2006Jul 10, 2007Crain Enterprises, Inc.Geomatic support having hinged legs with hinge lock
US7374140Jun 1, 2006May 20, 2008Crain Enterprises, Inc.Geomatic pole support with telescoping legs and locks
US7611105 *Dec 28, 2006Nov 3, 2009Kenneth CarazoCorner prism pole and stand
US7631842Apr 18, 2003Dec 15, 2009Seco Manufacturing Company, Inc.Modular geomatic pole support system
US7669813Jan 10, 2005Mar 2, 2010Seco Manufacturing Company, Inc.Multiple function geomatics pole support device
US20030226941 *Apr 18, 2003Dec 11, 2003Crain Enterprises, Inc.Modular geomatic pole support system
US20030234326 *Apr 18, 2003Dec 25, 2003Crain Enterprises, Inc.Geomatic support having hinged legs with hinge lock
US20030235459 *Apr 18, 2003Dec 25, 2003Crain Enterprises, Inc.Mount and connection system for use with geomatic pole
US20040000622 *Apr 18, 2003Jan 1, 2004Crain Enterprises, Inc.Telescoping leg lock with thumb actuator
US20040004168 *Apr 18, 2003Jan 8, 2004Crain Enterprises, Inc.Geomatic pole support and foot therefor
US20040075031 *Apr 18, 2003Apr 22, 2004Crain Enterprises, Inc.Geomatic pole support wtih telescoping legs and locks
US20040227040 *May 25, 2004Nov 18, 2004Crain Enterprise, Inc.Geomatic pole support and foot therefor
US20050151035 *Jan 10, 2005Jul 14, 2005Crain Enterprises, Inc.Multiple function geomatics pole support device
US20060118681 *Jan 17, 2006Jun 8, 2006Crain Enterprises, Inc.Geomatic support having hinged legs with hinge lock
US20060231694 *Jun 1, 2006Oct 19, 2006Crain Enterprises, Inc.Geomatic pole support with telescoping legs and locks
WO1983003134A1 *Mar 8, 1983Sep 15, 1983Willy Palle PedersenA terrestrial localization plant and auxiliaries for the use thereof
Classifications
U.S. Classification33/296, 248/524, 248/163.1
International ClassificationG01C15/08, G01P15/08, F16M11/00
Cooperative ClassificationG01P15/08, F16M11/046, G01C15/08, F16M11/28, F16M11/245
European ClassificationF16M11/24A1, F16M11/04T2, F16M11/28, F16M11/00, G01P15/08, G01C15/08